[2月19日]Phonon-Glass Electron-Crystal Thermoelectric Clathrates: Theory

题　目🈷️🧑🏼‍🌾：Phonon-Glass Electron-Crystal Thermoelectric Clathrates: Theory
报告人🧙🏿：Prof. Tsuneyoshi Nakayama(Hokkaido University, Saporo, Japan)
时　间：2月19日（周三）🚵🏻‍♂️，上午10:30-11:30
地　点🐿：南校区第一实验楼423会议室

报告摘要：

The “phonon-glass electron-crystal” concept is one of the guiding principles to explore efficient thermoelectric materials. Type-I clathrate compounds satisfy this concept, in which the group 1 or 2 elements in the periodic table are encaged as the so-called “rattling” guest atom. It is remarkable that, though these cage-forming compounds have crystalline cubic-structure, they exhibit glass-like phonon thermal conductivity over the whole temperature range. An efficient thermoelectric effect is realized in clathrates showing these glass-like characteristics. The point is why these compounds without topological disorder show almost identical dynamic and thermal properties to those of structural glasses. I will present theoretical interpretation on the emergence of glass-like behaviors, based on our recent article1).

Reference:

1) Phonon-Glass Electron-Crystal Thermoelectric Clathrates: Experiments and Theory, to be published in “Reviews of Modern Physics”

个人简介🧜🏽‍♂️：

• 1968, BA, Department of Applied Physics, Hokkaido University
• 1970, MSc, Department of Applied Physics, Hokkaido University
• 1973, Dr, Department of Applied Physics, Hokkaido University
• 1986-2008, Professor, Department of Applied Physics, Hokkaido University, Sapporo
• 2004-2006, Dean, Faculty of Engineering, Hokkaido University, Sapporo
• 2008-2010, Research Fellow, Toyota Physical and Chemical Research Institute, Nagoya
• 2010-2012, Director, Hokkaido Branch of Japan Science and Technology Agency (JST)
• 2012-2013, Martin Gutzwiller Fellow, Max Planck Institute for the Physics of Complex Systems, Dresden